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<p>You can try a few things. If there is an external loop in the
feed (I think it is usually a white or yellow wire) you may remove
or add one loop. Another trick seems to be to add two diodes in
series between coil and tachometer. A bit more involved but very
doable as a DIY person is to change the print board inside:</p>
<h1 class="it-ttl" itemprop="name" id="itemTitle"><font size="-1"><span
style="font-weight: normal;">Smiths RVI - RVC Tachometer
conversion board + calibration cable -566-</span></font></h1>
<p><a class="moz-txt-link-abbreviated" href="http://www.eBay.com">www.eBay.com</a> nr: 380578001095</p>
<p>Having the tach rebuild is way more expensive so it may be worth
to experiment a bit with the above.<br>
</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 27-11-2020 om 17:05 schreef Fred
Wescoe via Healeys:<br>
</div>
<blockquote type="cite"
cite="mid:CAPAC+V6w9o6ssZCfoyGy1YehTWMVGyMUFJLPzEitMnWR9F2ZYw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Listers,
<div><br>
</div>
<div>A few days ago, on one of the lists, there was
discussion of a 66 BJ8 electronic tach that was not reading
correctly after installing a Pertronix ignition setup. I just
installed the Pertronix (points conversion) system and coil
and now the tach does not read correctly. The comments
mentioned that tachs had to be rebuilt specifically for the
pertonics conversion. Several places that
repair/rebuild/calibrate our Smiths tachometer with the
Pertronix ignition system were recommended. As I put the car
away for winter, I would like to get the tach
repaired/rebuilt/calibrated. I have lost those comments and
therefore the links to those repair sources. Can anyone refer
me to those services? </div>
<div><br>
</div>
<div>Thanks as always for the comments and wisdom,</div>
<div><br>
</div>
<div>Fred</div>
<div>66 BJ8</div>
</div>
<br>
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